CVE-2025-10503: WSO2 Identity Server

Medium severity, CVSS 6.1. EPSS: 0.2% chance of exploitation in the next 30 days.

The authentication endpoint accepts user-supplied input without enforcing expected validation constraints, leading to a lack of proper output encoding. This allows for the injection of malicious JavaScript payloads, enabling reflected cross-site scripting. An attacker can leverage this vulnerability to redirect the user's browser to a malicious website, modify the user interface of the web page, retrieve information from the browser, or cause other harmful actions. However, due to the protection of session-related cookies with the httpOnly flag, session hijacking is not possible.

Affected products

• WSO2 Identity Server: from 7.1.0, before 7.1.0.28 (fixed in 7.1.0.28)

Published 2026-04-29. Last modified 2026-10-07.